◎ 题干
-- Hello, this is Jack. May I speak to Tom?
-- Sorry, he isn’t in at the moment. If he _______ back, I’ll ask him to call you back.
A.come B.comes
C.have come D.came
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“-- Hello, this is Jack. May I speak to Tom?-- Sorry, he isn’t in at the moment. If he _______ back, I’ll ask him to call you back.A.comeB.comesC.have comeD…”主要考查了你对  【状语从句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。